Marking tool



FIG. 1 is a perspective view of the marking tool;

FIG. 2 is a top elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side view thereof; and,

FIG. 5 is another front elevational view thereof in a condition of use.

The broken lines showing of a portion of a surface, a pencil and a hand are included for the purpose of illustrating environment and form no part of the claimed design. 

The ornamental design for a marking tool, as shown and described. 